“There were some working disagreements which arose last time related to which storage devices (the data) will be transferred onto and how, and so on. I would say these are not so much substantial matters as issues of logistics,” Russian President Vladimir Putin’s spokesman, Dmitry Peskov, said Wednesday.

“As far as we know via our sports authorities, there are intensive contacts under way and now understanding has been reached with the WADA representatives regarding how the work will continue.”

WADA spokesman James Fitzgerald said the three-person team had arrived in the Russian capital.

“They look forward to starting their work tomorrow,” Fitzgerald told The Associated Press by email.

Despite protests from many Western athletes and anti-doping figures, WADA lifted a suspension on Russia’s anti-doping agency, known as RUSADA, in September on condition the country handed over the data by Dec. 31. A WADA group which visited last month left empty-handed when Russian officials claimed their equipment wasn’t certified under Russian law.

Even after the deadline was missed, WADA has said it could still accept Russian co-operation before a committee meeting rules on RUSADA next week. Russia must also make stored lab samples available for analysis by June 30.